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United States Patent | 5,664,508 |
Mulcahey ,   et al. | September 9, 1997 |
A method and apparatus for forming a side panel for a mattress sack or a box spring enclosure. The apparatus includes a double needle sewing machine and a guide for the ends of the folded side panel which are being stitched together which aligns and guides the ends through the stitching area. Photocells are provided to start and stop the stitching process. The method includes the step of stopping the stitching process after a predetermined number of stitches if light from a second photocell in the feed direction is not interrupted within a predetermined number of stitches.
Inventors: | Mulcahey; Charles E. (Beverly, MA); Porter; Michael R. (Topsfield, MA) |
Assignee: | Porter Sewing Machines, Inc. (Beverly, MA) |
Appl. No.: | 620087 |
Filed: | March 21, 1996 |
Current U.S. Class: | 112/2.1; 112/153; 112/163; 112/277; 112/470.05; 112/475.06 |
Intern'l Class: | D05B 011/00; D05B 019/12; 167; 470.01; 2.1 |
Field of Search: | 112/163,153,277,275,470.02,470.03,470.05,475.02,475.03,475.06,475.08,165,166 5/448 |
3363594 | Jan., 1968 | Kosrow | 112/277. |
4526114 | Jul., 1985 | Martell et al. | 112/475. |
4843986 | Jul., 1989 | Kozuka et al. | 112/163. |
5170733 | Dec., 1992 | Honma et al. | 112/153. |
5249322 | Oct., 1993 | Seago | 112/163. |